Home / 1,344.05-1,857.87-1,121.70

Finding the Fourth Proportional to 1,344.05, 1,857.87 and 1,121.70

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Solution

The fourth proportional to 1,344.05, 1,857.87 and 1,121.70 is: 1,550.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.05 : 1,857.87 = 1,121.70 : x
  2. Step 2: Convert to fraction form
    1,344.05/1,857.87 = 1,121.70/x
  3. Step 3: Cross multiply
    1,344.05x = 1,857.87 × 1,121.70
  4. Step 4: Simplify right side
    1,344.05x = 2,083,972.78
  5. Step 5: Solve for x
    x = 2,083,972.78/1,344.05
  6. Step 6: Final answer
    x = 1,550.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.